package thread;
/**
 * 静态方法如果使用synchronized修饰，那么该方法一定具有同步效果，锁的都只能是当前类
 */
public class SyncDemo2 {
    public static void main(String[] args) {
        /*
        Thread t1 = new Thread(new Runnable() {
            public void run() {
                Boo.doSome();
            }
        });
         */

        /*
        Thread t1 = new Thread(() -> {
            Boo.doSome();
        });
         */

        Thread t1 = new Thread(Boo :: doSome); //方法引用
        Thread t2 = new Thread(Boo :: doSome);
        t1.start();
        t2.start();
    }
}

class Boo {
    //public synchronized static void doSome() {
    public static void doSome() {
        synchronized (Boo.class) {
            try {
                Thread t = Thread.currentThread();
                System.out.println(t.getName() + ":正在执行doSome方法");
                Thread.sleep(3000);
                System.out.println(t.getName() + "执行doSome方法完毕");
            } catch (InterruptedException e) {
            }
        }
    }
}